Millibars to Standard atmospheres Converter

1 millibar (mbar) equals 0.000986923267 standard atmospheres (atm).

Quick answer

  • 1 millibar = 0.000986923267 standard atmospheres
  • 1 standard atmosphere = 1,013.25 millibars
  • Formula: atm = mbar ÷ 1,013.25

1 millibar = 0.000986923267 standard atmospheres

How to convert millibars to standard atmospheres

atm = mbar ÷ 1,013.25

To convert millibars to standard atmospheres, divide the number of millibars by 1,013.25.

Example: 18 mbar to atm

  1. Start with the value in millibars: 18 mbar.
  2. Divide by 1,013.25: 18 ÷ 1,013.25 = 0.0177646188.
  3. Result: 18 millibars = 0.0177646188 standard atmospheres.

Going the other way, 1 standard atmosphere = 1,013.25 millibars, so to convert standard atmospheres back to millibars you multiply by the same number. See standard atmospheres to millibars.

Millibars to standard atmospheres conversion table

Millibars (mbar)Standard atmospheres (atm)
0.25 mbar 0.000246730817 atm
0.5 mbar 0.000493461633 atm
0.75 mbar 0.00074019245 atm
1 mbar 0.000986923267 atm
1.5 mbar 0.0014803849 atm
2 mbar 0.001973846533 atm
2.5 mbar 0.002467308167 atm
3 mbar 0.0029607698 atm
4 mbar 0.003947693067 atm
5 mbar 0.004934616334 atm
6 mbar 0.0059215396 atm
7 mbar 0.006908462867 atm
8 mbar 0.007895386134 atm
9 mbar 0.0088823094 atm
10 mbar 0.009869232667 atm
11 mbar 0.01085615593 atm
12 mbar 0.0118430792 atm
13 mbar 0.01283000247 atm
14 mbar 0.01381692573 atm
15 mbar 0.014803849 atm
16 mbar 0.01579077227 atm
17 mbar 0.01677769553 atm
18 mbar 0.0177646188 atm
19 mbar 0.01875154207 atm
20 mbar 0.01973846533 atm
21 mbar 0.0207253886 atm
22 mbar 0.02171231187 atm
23 mbar 0.02269923513 atm
24 mbar 0.0236861584 atm
25 mbar 0.02467308167 atm
26 mbar 0.02566000493 atm
27 mbar 0.0266469282 atm
28 mbar 0.02763385147 atm
29 mbar 0.02862077473 atm
30 mbar 0.029607698 atm
31 mbar 0.03059462127 atm
32 mbar 0.03158154453 atm
33 mbar 0.0325684678 atm
34 mbar 0.03355539107 atm
35 mbar 0.03454231434 atm

More mbar to atm values

What is a millibar?

The millibar is a thousandth of a bar, equal to one hectopascal.

More about millibars →

What is a standard atmosphere?

The standard atmosphere is the average air pressure at sea level, defined as exactly 101,325 pascals, 760 mmHg or about 14.696 psi.

More about standard atmospheres →

Convert millibars to other units

Convert other units to standard atmospheres

Frequently asked questions

How many standard atmospheres are in a millibar?

One millibar is 0.000986923267 standard atmospheres.

How many millibars are in a standard atmosphere?

One standard atmosphere is 1,013.25 millibars.

What is the formula to convert millibars to standard atmospheres?

atm = mbar ÷ 1,013.25.